Hydroponic growing system



FIG. 1 is a front elevational view of the hydroponic growing system showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is an end elevational view taken from the right of FIG. 4.

FIG. 6 is an end elevational view taken from the left of FIG. 4. 

The ornamental design for a hydroponic growing system, substantially as shown and described. 